package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.DishDTO;
import com.sky.dto.DishPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.DishFlavor;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.DishFlavorMapper;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealDishMapper;
import com.sky.result.PageResult;
import com.sky.service.DishService;
import com.sky.vo.DishVO;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import javax.xml.ws.handler.MessageContext;
import java.util.List;

@Service
@Slf4j
public class DishServiceImpl implements DishService {

    @Autowired
    private DishMapper dishMapper;
    @Autowired
    private SetmealDishMapper setmealDishMapper;
    @Autowired
    private DishFlavorMapper dishFlavorsMapper;

    /**
     * 新增菜品和对应口味
     *
     * @param dishDTO
     */
    @Override
    @Transactional  //操作多张表保证原子性
    public void saveWithFlavor(DishDTO dishDTO) {

        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO, dish);//属性命名必须保持一致才可以
        //向菜品表添加一条数据
        dishMapper.insert(dish);
        //获取插入数据时生成的主键值
        Long dishId = dish.getId();

        List<DishFlavor> flavors = dishDTO.getFlavors();
        if (flavors != null && flavors.size() > 0) {

            //在插入口味数据之前将dishId插入给flavor对象的id属性
            flavors.forEach(dishFlavor -> {
                dishFlavor.setId(dishId);
            });
            //口味表添加多条数据
            dishFlavorsMapper.insertBatch(flavors);  //mybatis提供的批量插入方法 list集合
        }

    }

    /**
     * 菜品分页查询
     *
     * @param dishPageQueryDTO
     * @return
     */
    @Override
    public PageResult pageQuery(DishPageQueryDTO dishPageQueryDTO) {
        PageHelper.startPage(dishPageQueryDTO.getPage(), dishPageQueryDTO.getPageSize());
        Page<DishVO> page = dishMapper.pageQuery(dishPageQueryDTO);
        return new PageResult(page.getTotal(), page.getResult());
    }

    /**
     * 菜品批量删除
     *
     * @param ids
     */
    @Override
    @Transactional
    public void deleteBatch(List<Long> ids) {
        //判断当前菜品是否能够删除（是否启售）
        for (Long id : ids) {
            Dish dish = dishMapper.getById(id);
            if (dish.getStatus() == StatusConstant.ENABLE) {
                //当前菜品状态是启售中，不能删除
                throw new DeletionNotAllowedException(MessageConstant.DISH_ON_SALE);
            }
        }
        //是否套餐关联
        List<Long> setmealIds = setmealDishMapper.getSetmealIdByDishIds(ids);
        if (setmealIds != null && setmealIds.size() > 0) {
            //当前菜品关联了套餐
            throw new DeletionNotAllowedException(MessageConstant.DISH_BE_RELATED_BY_SETMEAL);
        }

        //删除菜品数据  关联的口味数据
        /*for (Long id : ids) {
            dishMapper.deleteById(id);
            dishFlavorsMapper.deleteByDishId(id);
        }*/
        //根据菜品id集合批量删除 一条sql集合
        dishMapper.deleteByIds(ids);
        dishFlavorsMapper.deleteByDishIds(ids);

    }

    @Override
    public DishVO getByIdWithFlavor(Long id) {

        //1.查菜品  2.口味  3.分装VO
        Dish dish = dishMapper.getById(id);
        List<DishFlavor> dishFlavors = dishFlavorsMapper.getByDishId(id);
        DishVO dishVO = new DishVO();
        BeanUtils.copyProperties(dish, dishVO);
        dishVO.setFlavors(dishFlavors);
        return dishVO;
    }

    /**
     * 根据id修改菜品基本信息和对应的口味信息
     * @param dishDTO
     */
    @Override
    public void updateWithFlavor(DishDTO dishDTO) {
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO,dish);
        //先删除在插入
        dishMapper.update(dish);
        dishFlavorsMapper.deleteByDishId(dishDTO.getId());
        List<DishFlavor> flavors = dishDTO.getFlavors();
        if (flavors != null && flavors.size() > 0) {
            //在插入口味数据之前将dishId插入给flavor对象的id属性
            flavors.forEach(dishFlavor -> {
                dishFlavor.setId(dishDTO.getId());
            });
            //口味表添加多条数据
            dishFlavorsMapper.insertBatch(flavors);  //mybatis提供的批量插入方法 list集合
        }

    }
}
